In the UK, wild rabbits can mate with domestic rabbits. But people being the way they are, it was probably released into the wild by it's owner. Since most tame rabbits will run away from strangers, it's hard to tell that way.

Can you call the RSPCA and see if someone can set up live traps in the area?

Yes you can - on my way to school I see a few white wild rabbits, and blacks, though mainly I see agouti, on a very big roundabout. I definitely don't think a domestic rabbit has got in with them, they are just born like that.

People get all excited an point at them when we see them on the bus, hehe.